I was pondering setting up an open collection for pilot stories, for authors seeking reader opinions on proof of concept before deciding whether it's worth expanding the story or adding more episodes. 2K-10K words, say, complete short stories in their own right with plot and characterisation.
It wouldn't be a 'Writing Event' and it definitely wouldn't be a 'Series'. That leaves 'Universe', which is described as
A universe is an organizational structure that allows you to organize stories and series that exist in a certain alternate reality that is in common between them.
For example two separate stories that have a common backdrop of a certain disaster, or set on a certain planet. The background is common, but the characters don't have to be in common at all.
That doesn't seem to fit either. Any suggestions?